Casandra
Casandra Test Code LC54185Version 1 (DRAFT)
Performing Lab
Immunoglobulin G, Subclass 4
Also known as: IgG Subclass 4, IgG4
Clinical Use
Order TestUse
Evaluate sinopulmonary infections, asthma; immunotherapy hyposensitization; evaluate allergies
Special Instructions
State patient's age on the request form.
Limitations
This procedure is not suitable for samples containing rheumatoid factor, paraproteins, other circulating immune complexes, or for lipemic or hemolyzed samples due to the unpredictable degree of nonspecific light scatter these samples may generate. The results obtained from measuring IgG subclasses should not be used in assessing atopy in allergic patients.
Test Details
Methodology
Immunoassay
Biomarkers
Immunoglobulin G, Subclass 4
AnalyteQuantitation • Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)
LOINC Codes
Order Codes
- 2469-5
Result Codes
- 2469-5
Result Turnaround Time
3-5 days
Related Documents
For more information, please review the documents below
Specimen Requirements
Specimen
Serum
Volume
1 mL
Minimum Volume
0.4 mL
Container
Red-top tube or gel-barrier tube
Collection Instructions
Transfer specimen to a plastic transport tube.
Storage Instructions
Refrigerate
Causes for Rejection
Gross lipemia; hemolysis
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 3 days |
| Refrigerated | 14 days |
| Frozen | 14 days |